Because the air is thin
people take about 5 breaths on mount everest
It is difficult to breathe on the summit of Mount Everest because there is less air to breathe than what is at sea level.
How first five climbers of mount everest and which date he was over climbing?
Edmund Hillary and Tenzing Norgay were the first climbers to reach the summit of Mount Everest in 1953.
Climbers use bottled oxygen on Mount Everest to help them breathe more easily because the higher you climb the less oxygen there is. At the summit of Mount Everest there is approximately 33% of the oxygen that is available at sea level.
Climbers who climb on Mount Everest come from all over the world.
Nearly all climbers on Mount Everest have oxygen tanks to help them breathe more easily because the higher you climb the less oxygen there is in the air.
You can read lots of facts about Mount Everest and its climbers at the link given
The first climbers to visit Mount Everest was a British Expedition in 1921. They returned to the mountain in 1922 and 1924.
The following Country's had climbers on Mount Everest in 1996: USA New Zealand Japan South Africa
The only pollution on Mount Everest is the rubbish that climbers leave behind.
Climbers risk their lives by climbing on Mount Everest for the thrill, challenge and adventure.